umbral | 6b3fb6fce70e0a6cbe4dec6627f76ff70414048360f03c7d72099fbd059591ed

Analysis

max time kernel
32s
max time network
33s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
17-09-2024 00:47

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General

Target

Emerald X/Emerald.exe
Size

229KB
MD5

f50a9b0c2670af5b0e3371ecdcebed27
SHA1

e114834c05d2e86db3c3d45ccbd46a7c32950167
SHA256

abbf1cd65c8d762019873c47b45e374d0c75cb28ddf754a8ddb35501f3cb63b2
SHA512

21784568e5f27bbd0235fb37d7a7381055da13f27c00b6399bbb09b286bc58a965f00bb925950855392aad57678d34ccd0de4d13b10f9ae7503bc192143a90c6
SSDEEP

6144:lloZM+rIkd8g+EtXHkv/iD4eudRU69VecbGkFZwEPb8e1moi:noZtL+EP8eudRU69VecbGkFZwWq

Score

10^/10

umbral credential_access discovery execution spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral2/memory/4108-1-0x0000015C1D620000-0x0000015C1D660000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral
Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
credential_access stealer

Credentials from Web Browsers
T1555.003

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
3028	powershell.exe
208	powershell.exe
5096	powershell.exe
2684	powershell.exe

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	Emerald.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
21	discord.com
22	discord.com

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
8	ip-api.com

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
1504	cmd.exe
2440	PING.EXE

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
3444	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
2440	PING.EXE

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
4108	Emerald.exe
3028	powershell.exe
3028	powershell.exe
208	powershell.exe
208	powershell.exe
5096	powershell.exe
5096	powershell.exe
536	powershell.exe
536	powershell.exe
2684	powershell.exe
2684	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4108	Emerald.exe
Token: SeIncreaseQuotaPrivilege	1800	wmic.exe
Token: SeSecurityPrivilege	1800	wmic.exe
Token: SeTakeOwnershipPrivilege	1800	wmic.exe
Token: SeLoadDriverPrivilege	1800	wmic.exe
Token: SeSystemProfilePrivilege	1800	wmic.exe
Token: SeSystemtimePrivilege	1800	wmic.exe
Token: SeProfSingleProcessPrivilege	1800	wmic.exe
Token: SeIncBasePriorityPrivilege	1800	wmic.exe
Token: SeCreatePagefilePrivilege	1800	wmic.exe
Token: SeBackupPrivilege	1800	wmic.exe
Token: SeRestorePrivilege	1800	wmic.exe
Token: SeShutdownPrivilege	1800	wmic.exe
Token: SeDebugPrivilege	1800	wmic.exe
Token: SeSystemEnvironmentPrivilege	1800	wmic.exe
Token: SeRemoteShutdownPrivilege	1800	wmic.exe
Token: SeUndockPrivilege	1800	wmic.exe
Token: SeManageVolumePrivilege	1800	wmic.exe
Token: 33	1800	wmic.exe
Token: 34	1800	wmic.exe
Token: 35	1800	wmic.exe
Token: 36	1800	wmic.exe
Token: SeIncreaseQuotaPrivilege	1800	wmic.exe
Token: SeSecurityPrivilege	1800	wmic.exe
Token: SeTakeOwnershipPrivilege	1800	wmic.exe
Token: SeLoadDriverPrivilege	1800	wmic.exe
Token: SeSystemProfilePrivilege	1800	wmic.exe
Token: SeSystemtimePrivilege	1800	wmic.exe
Token: SeProfSingleProcessPrivilege	1800	wmic.exe
Token: SeIncBasePriorityPrivilege	1800	wmic.exe
Token: SeCreatePagefilePrivilege	1800	wmic.exe
Token: SeBackupPrivilege	1800	wmic.exe
Token: SeRestorePrivilege	1800	wmic.exe
Token: SeShutdownPrivilege	1800	wmic.exe
Token: SeDebugPrivilege	1800	wmic.exe
Token: SeSystemEnvironmentPrivilege	1800	wmic.exe
Token: SeRemoteShutdownPrivilege	1800	wmic.exe
Token: SeUndockPrivilege	1800	wmic.exe
Token: SeManageVolumePrivilege	1800	wmic.exe
Token: 33	1800	wmic.exe
Token: 34	1800	wmic.exe
Token: 35	1800	wmic.exe
Token: 36	1800	wmic.exe
Token: SeDebugPrivilege	3028	powershell.exe
Token: SeDebugPrivilege	208	powershell.exe
Token: SeDebugPrivilege	5096	powershell.exe
Token: SeDebugPrivilege	536	powershell.exe
Token: SeIncreaseQuotaPrivilege	1332	wmic.exe
Token: SeSecurityPrivilege	1332	wmic.exe
Token: SeTakeOwnershipPrivilege	1332	wmic.exe
Token: SeLoadDriverPrivilege	1332	wmic.exe
Token: SeSystemProfilePrivilege	1332	wmic.exe
Token: SeSystemtimePrivilege	1332	wmic.exe
Token: SeProfSingleProcessPrivilege	1332	wmic.exe
Token: SeIncBasePriorityPrivilege	1332	wmic.exe
Token: SeCreatePagefilePrivilege	1332	wmic.exe
Token: SeBackupPrivilege	1332	wmic.exe
Token: SeRestorePrivilege	1332	wmic.exe
Token: SeShutdownPrivilege	1332	wmic.exe
Token: SeDebugPrivilege	1332	wmic.exe
Token: SeSystemEnvironmentPrivilege	1332	wmic.exe
Token: SeRemoteShutdownPrivilege	1332	wmic.exe
Token: SeUndockPrivilege	1332	wmic.exe
Token: SeManageVolumePrivilege	1332	wmic.exe

Suspicious use of WriteProcessMemory 26 IoCs

description	pid	Process	procid_target
PID 4108 wrote to memory of 1800	4108	Emerald.exe	82
PID 4108 wrote to memory of 1800	4108	Emerald.exe	82
PID 4108 wrote to memory of 916	4108	Emerald.exe	85
PID 4108 wrote to memory of 916	4108	Emerald.exe	85
PID 4108 wrote to memory of 3028	4108	Emerald.exe	87
PID 4108 wrote to memory of 3028	4108	Emerald.exe	87
PID 4108 wrote to memory of 208	4108	Emerald.exe	89
PID 4108 wrote to memory of 208	4108	Emerald.exe	89
PID 4108 wrote to memory of 5096	4108	Emerald.exe	93
PID 4108 wrote to memory of 5096	4108	Emerald.exe	93
PID 4108 wrote to memory of 536	4108	Emerald.exe	95
PID 4108 wrote to memory of 536	4108	Emerald.exe	95
PID 4108 wrote to memory of 1332	4108	Emerald.exe	98
PID 4108 wrote to memory of 1332	4108	Emerald.exe	98
PID 4108 wrote to memory of 3036	4108	Emerald.exe	100
PID 4108 wrote to memory of 3036	4108	Emerald.exe	100
PID 4108 wrote to memory of 3064	4108	Emerald.exe	102
PID 4108 wrote to memory of 3064	4108	Emerald.exe	102
PID 4108 wrote to memory of 2684	4108	Emerald.exe	104
PID 4108 wrote to memory of 2684	4108	Emerald.exe	104
PID 4108 wrote to memory of 3444	4108	Emerald.exe	106
PID 4108 wrote to memory of 3444	4108	Emerald.exe	106
PID 4108 wrote to memory of 1504	4108	Emerald.exe	108
PID 4108 wrote to memory of 1504	4108	Emerald.exe	108
PID 1504 wrote to memory of 2440	1504	cmd.exe	110
PID 1504 wrote to memory of 2440	1504	cmd.exe	110

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
916	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Emerald X\Emerald.exe
"C:\Users\Admin\AppData\Local\Temp\Emerald X\Emerald.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4108
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1800
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\Emerald X\Emerald.exe"
  2⤵
  - Views/modifies file attributes
  PID:916
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\Emerald X\Emerald.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3028
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend && powershell Set-MpPreference -SubmitSamplesConsent 2
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:208
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5096
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:536
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1332
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:3036
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:3064
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:2684
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:3444
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\Emerald X\Emerald.exe" && pause
  2⤵
  - System Network Configuration Discovery: Internet Connection Discovery
  - Suspicious use of WriteProcessMemory
  PID:1504
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:2440

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

System Network Configuration Discovery

T1016

Internet Connection Discovery

T1016.001

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
948B

MD5
0b8cb2e6dd5794b6a56a4bdbbd430fd7

SHA1
2b08e348c3489c6a35761af073018e3784c12074

SHA256
bcce0d44e33747e4c39df9afbd0a4e98a47ded0188375e4dfdd94cafbb366e1f

SHA512
15ce3b588aa80899f69b0313c7e188d886bddbd09783ca732ac33f9ae8e4e017a72b6f98919f581383a4582732575e5faedb0dea87e01cf2b657424945fdf4d2

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
548dd08570d121a65e82abb7171cae1c

SHA1
1a1b5084b3a78f3acd0d811cc79dbcac121217ab

SHA256
cdf17b8532ebcebac3cfe23954a30aa32edd268d040da79c82687e4ccb044adc

SHA512
37b98b09178b51eec9599af90d027d2f1028202efc1633047e16e41f1a95610984af5620baac07db085ccfcb96942aafffad17aa1f44f63233e83869dc9f697b

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
ec79fae4e7c09310ebf4f2d85a33a638

SHA1
f2bdd995b12e65e7ed437d228f22223b59e76efb

SHA256
e9c4723a5fe34e081c3d2f548a1d472394cc7aa58056fcf44ca542061381243a

SHA512
af9dda12f6bb388d826fe03a4a8beed9bda23a978aa55a2af6a43271660ee896a7ee3bcf2c4d2f1e6180902791d8c23560f1c2ec097a501d8c6f4f6c49075625

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2jdxr3n1.ktx.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3028-13-0x000001895E210000-0x000001895E232000-memory.dmp

Filesize
136KB

Download
memory/3028-14-0x00007FFF42910000-0x00007FFF433D1000-memory.dmp

Filesize
10.8MB

Download
memory/3028-15-0x00007FFF42910000-0x00007FFF433D1000-memory.dmp

Filesize
10.8MB

Download
memory/3028-18-0x00007FFF42910000-0x00007FFF433D1000-memory.dmp

Filesize
10.8MB

Download
memory/3028-3-0x00007FFF42910000-0x00007FFF433D1000-memory.dmp

Filesize
10.8MB

Download
memory/4108-34-0x0000015C1F340000-0x0000015C1F390000-memory.dmp

Filesize
320KB

Download
memory/4108-33-0x0000015C37E40000-0x0000015C37EB6000-memory.dmp

Filesize
472KB

Download
memory/4108-35-0x0000015C1F2F0000-0x0000015C1F30E000-memory.dmp

Filesize
120KB

Download
memory/4108-1-0x0000015C1D620000-0x0000015C1D660000-memory.dmp

Filesize
256KB

Download
memory/4108-0-0x00007FFF42913000-0x00007FFF42915000-memory.dmp

Filesize
8KB

Download
memory/4108-71-0x0000015C1F2D0000-0x0000015C1F2DA000-memory.dmp

Filesize
40KB

Download
memory/4108-72-0x0000015C37DC0000-0x0000015C37DD2000-memory.dmp

Filesize
72KB

Download
memory/4108-2-0x00007FFF42910000-0x00007FFF433D1000-memory.dmp

Filesize
10.8MB

Download
memory/4108-90-0x0000015C37EC0000-0x0000015C38069000-memory.dmp

Filesize
1.7MB

Download
memory/4108-91-0x00007FFF42910000-0x00007FFF433D1000-memory.dmp

Filesize
10.8MB

Download